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楼主 |
发表于 2018-12-18 22:02:22
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void USART2_Init(void)
{
USART_InitTypeDef USART_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
USART_DeInit(USART2);//¸′λ′®¿ú1
USART_InitStructure.USART_BaudRate = 115200;//′®¿ú2¨ìØÂêÎa115200
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//×Ö3¤Îa8λêy¾Y¸ñê½
USART_InitStructure.USART_StopBits = USART_StopBits_1;//ò»¸öí£Ö1λ
USART_InitStructure.USART_Parity = USART_Parity_No;//ÎTÆæÅ¼D£Ñéλ
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//ÎTó2¼têy¾Yá÷¿ØÖÆ
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//êÕ·¢Ä£ê½
USART_Init(USART2, &USART_InitStructure); /* USART configuration */
GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_1); /* Connect PXx to USARTx_Tx */
GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_1); /* Connect PXx to USARTx_Rx */
/* Configure USART Tx as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;//Ö¸¶¨ÅäÖÃμÄIO¿úζ A9
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//Ä£ê½Îa¸′óÃÄ£ê½
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;//1¤×÷ÆμÂêÎa10MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//êä3öààDíÎaíÆíìêä3ö
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//éÏà-
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure USART Rx as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_Init(GPIOA, &GPIO_InitStructure);
//USART2 NVIC ÅäÖÃ
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority=1 ;//óÅÏè¼¶1
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQí¨μàê1Äü
NVIC_Init(&NVIC_InitStructure); //¸ù¾YÖ¸¶¨μÄ2Îêy3õê¼»ˉVIC¼Ä′æÆ÷
USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);////¿aÆô′®¿ú½óêüÖD¶Ï
/* Enable USART */
USART_Cmd(USART2, ENABLE);
} |
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